<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<script src="./js/move.js"></script>
<script>
    window.onload = function () {
    let oBtn = document.getElementById("btn");
    oBtn.onclick = function () { 
   _S(".dd").moveTo({"width":201,"height":300},function () { 
_S("#dv").moveTo({"width":300,"height":300})
    }); 
     }
    }
</script>
<style>
    div{
    width: 200px;
    height: 200px;
    position: absolute;
    background-color: #f00;
    margin-top: 10px;
    border: 1px solid #000;
}
</style>

<body>
    <input type="button" value="start" id="btn">
    <div id="dv">1</div>
    <div class="dd">2</div>
    <div>3</div>

</body>

</html>